The term "casual" can be misleading… Yes, there are some office environments where it’s okay to wear shorts, flip flops, and a lack of a good shower… but as professional women, it is imperative to always look our best and to always dress for the job we want not the one we have, so take “Casual Friday” as an opportunity to look sharp when others might be dressed casually.
Fashion Challenge: Professionals who go too far on Casual Fridays, and just don't know what's appropriate. For example, wearing flip-flops, shorts, or sweats to work.

Workplaces aren’t what they used to be — and that’s a good thing! Though professional attire is a must in virtually any workplace, what constitutes professional attire can vary wildly depending on profession, employer, and location. Even in more conservative workplaces, like a law or business office, some degree of relaxed or casual attire is permitted on certain days or during certain times of year.